Remove .env file requirement for app commands

[2can]

**I want to merge this PR because: ***

It removes the .env file requirement for app create and app deploy commands. No environment variables from the .env file are required for the aforementioned commands.

In the same time the app create doesn't require

Related issues

Steps to test feature

• create an app saleor app create - in the created folder there should be no .env file, and there should be no prompt for the organization and the environment
• deploy an app saleor app deploy - the .env file should not be required to deploy an app

I have:

• Tested it locally and it doesn't break existing features
• Added documentation if public changes are introduced
• Added tests for my code